Background Kaba Gilgen AG (Kaba) was contracted by Régie Autonome des Transports Parisiens (RATP) to upgrade metro stations in Paris with half-height Platform Screen Door (PSD) systems. The first stage of the project saw the development, production and installation of more than 10 km of platform screens, featuring up to 2,000, fully automatic, half-height PSD systems. The PSD systems were to deliver improvements to passenger safety, and to i

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